Radiator-cap lock



Oct 22, 1929. H. H. BOYCE 1,732,257

RADIATOR CAP LOCK Filed March 16, 1927 2 Sheets-Sheet l //v." .'/v TOR Hmvwmliurlbert Oct. 22, 1929. H. H. BOYCE RADIATOR CAP LOCK Filed March 16, 1927 2 Sheets-Sheet 2 11v VEN 70 k {Mn/MIMI? Patented Oct. 22, 1929 um'rsn STATES HARRISON HURLBERT BOYCE, F annrcno, NEW YORK RADIATOR-CA1 Loan Application filed March 16, 1927. Serial No. 175,682.

The object of this invention is to provide a new and improvedradiator cap lock which is simple in construction, eflicient in operation, and cheap of manufacture. Specifically the object of this invention is to provide a radiator cap lock of the expanding type in which the expansion is controlled by rotating a device for indicating the condition within a radiator.

Other objects will become apparent as the description proceeds.

Referring to the drawings in which I have illustrated whatI now deem the preferred embodiment of my invention:

Fig. l is a view in section showing my device applied to a radiator filler spout closure, the lock being shown in release condition and the closure partially'rai'sed.

Fig. 2 is a view in section similar to Fig.

1 but with the filler spout closure in closed position and the lock expanded.

Fig. 3 is a View on the line 33 of Fig. 2.

Fig. 4 is a detail view of the expansion lock member.

Fig. 5 is a detail view of the expanding member.

In Figure 1 I have illustrated the radiator filler spout 1 fixed to the radiator water chamber 2. The spout 1 is provided with an upwardly and rearwardly extending arm 3 to which the closure cap 4 is attached by a pin 5 and slots 6 formed in projections 7 extending from the closure cap 4.

The closure cap 4 is formed with a central opening 8 thru which the stem 9 of a device for indicating the condition within a radiator passes. The closure cap 4 is recessed to receive the base or flange 10 of the indicating device which is held from outward movement but free to rotate by a retaining member 11 fixed to the closure cap 4 by screws 12. A gasket 13 separates the flange 10 from the cap 4 and provides a tight joint at this point.

The closure cap 4 is provided at its lower face with a downwardly extending annular flange 14. lVhen the cap 4 is in closed position, the filler spout 1 extends inside of the flange 14 and seats against a gasket 15, as

shown in Figure 2.

I will now describe the locking device. The stem 9 of the indicating device is provided with threads 18. An expanding member 16 is provided with threads cooperating with the threads 18 and is adapted to be moved axially of the stem 9 by turning the indicating device of which the stem 9 is a part. It is of course necessary to preventthe rotation of the member 16 and to accomplish this I have shown a rectangular projection 16 on the upper side thereof with which cooperates a similarly shaped recess 4 in the closure cap 4. This expanding member 16 is provided with a beveled periphery 19 which as the member is displaced 5 upwardly by turning the indicating device 3 engages a beveled face 20 on an expansion member 17 expanding the latter.

The expansion member 17 is of substantially annular form with a downwardly and outwardly sloping inner face 20 which 00- operates with the sloping periphery 19 of the expanding member 16.

As clearly shown in Figs. 1 and 2, the upward movement of the member 16 will first carry the member 17 against the closure cap a body 4 and then expand the said member. To permit such expansion the member 17 is split at 20 as shown in Figure 4.

lVhen the closure cap 4 is in closedposition 30 the expansion member 17 lies within and adjacent the inner surface of the filler spout'l and when expanded firmly grips said spout 1 thus securely locking the closure cap 4 in closed position.

To release the lock it is only necessary to turn the indicating device stem 9 in the reverse direction thus moving the member 16 downward and permitting the split member l7 to return to its original shape thus freeing itselffrom the filler spout 1. The member 17 I is of course constructed of suitable material to retain its spring action indefinitely.

Portions 16 of the sloping periphery of the expanding member 16 as shown in Fig, 5 are cut away to reduce friction and prevent sticking of this member within the expansion member 17.

The purpose of the slot 6 is to permit the, closure cap 4 to partake of a short vertical 9 movement thus facilitating the opening and closing thereof.

Various changes in the construction 01 the embodiment illustrated in the drawings may be made without departing from the spirit of the invention, and I do not, therefore, desire to limit myself to the specific construction shown and described, but to interpret the invention broadly within the scope of the appended claims.

What I claim as my invention is: V

1. In a device of the class described, a radiator, a radiator cap, a device for indicating the condition within said radiator mounted on and extending thru said radiator cap and fixed against translation but free to rotate relative to said cap, and an expanding locking device operated by rotation of said indicating device.

2. The combination with a radiator filler spout closure device comprising a closure cap pivoted to said filler spout by a pin and slot connection, of a device for locking the closure device in close-d position on said filler spout comprising, an expansion ring, an expanding member cooperating therewith, and a rotary member cooperating with said expanding member to expand said expansion ring to locking position.

3. In a radiator closure cap locking device, a radiator. cap, a device for indicating the condition within a radiator mounted on said radiator cap and fixed against translation but free to rotate, a member cooperative therewith fixed against rotation but capable of translation and a locking ring operated by said last named member.

4:. In a radiator closure cap locking device, a member fixed against translation but "free to rotate, a member cooperating therewith and fixed against rotation but capable of translation, and an expansion locking ring operated by one of said members.

5. In a radiator filler spout closure device of the class described, a rotary heat indicating element having a screw threaded stem, a beveled expanding member positioned by r0- tation of said screw threaded stem, and an expansion locking member expanded by movement of said second named member into engagement with the filler spout. 6. In a device of the class described for sealing a radiator filler spout, comprising a filler cap, a member adapted for rotation secured to and projecting externally of said filler cap, a screw threaded stem operated by said member extending internally of said cap, an expanding member, and an expansion member, said expanding member adapted to force said expansion member against said filler spout upon rotation of said first mentioned member. I

Intestimony whereof I have affixed my signature tothis specification.

HARRISON HURLBERT BOYCE. 

